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Asteroid Near-Earth

516435

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516435 (2004 FJ29)

Where is it now

Distance from Sun
0.839 AU
True anomaly
97.32°
Distance from Earth
1.562 AU
As of
21 October 2026

Two-body Kepler propagation — accurate to ~0.1% for major planets over decades, less so for highly-perturbed bodies. Use JPL Horizons for high precision.

Sun Earth — 0.995 AU from the Sun Earth 516435 — 0.839 AU from the Sun 516435
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 516435 is 1.562 AU from Earth today (13.0 light-minutes).

In the sky

Right ascension
11h 49m 26s
Declination
-13° 35′ 29″
Constellation
Crater
Distance from Earth
1.57 AU
Elongation from the Sun
28.72° — near the Sun — look low at dusk or dawn

Visible from both hemispheres.

From your location

See how high it is right now, whether it is up after civil twilight, and when it rises and sets where you are.

How do I find my coordinates?

Google Maps on a computer

  1. Right-click the spot where you'll be observing.
  2. The first line of the menu is the coordinates, e.g. 51.50722, -0.12758 — click it and they're copied.
  3. Paste them above.

Google Maps on a phone

  1. Press and hold the spot to drop a pin.
  2. The coordinates appear in the search bar (or on the pin's card) — tap to copy, then paste above.

A full Google Maps link works too, but the short maps.app.goo.gl share links don't carry coordinates — copy the numbers instead. We round to about a kilometre; that's all the sky calculation needs.

Know your what3words address? Paste it, e.g. ///filled.count.soap. This is optional — the three words are sent to what3words to convert them, and we don't store the address or the result.

Your location stays in your browser and is sent only for this calculation. Using a what3words address is optional; if you do, the three words go to what3words to be converted and we don't record them. Set a location first, then you can save an email alert for this object. See our privacy policy.

Two-body approximation, good to about a degree for the planets — enough to find the constellation and know whether it is up.

Orbital elements

Semi-major axis
0.913 AU
Eccentricity
0.3492
Inclination
33.44°
Orbital period
318.8 days
Perihelion
0.594 AU
Aphelion
1.232 AU
Longitude of ascending node
195.42°
Argument of periapsis
210.27°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 51.4 LD
0.1322 AU
Tisserand (Jupiter)
6.353

Orbit quality

Orbit very well determined (uncertainty code 0).

Observations used
170
Data arc
21.09 years
First observed
29 March 2004
Last observed
30 April 2025
Residual RMS
0.42 ″
Solution · Otto Matic
1 May 2025

Visual & observation

Absolute magnitude (H)
21.4

Discovery & classification

Discovered by
Siding Spring Survey
Discovery date
29 March 2004
Discovery site
Siding Spring

Also known as 2004 FJ29

Aten Near-Earth Object

Close approaches 38 on record

Flyby geometry
Ecliptic flyby of 516435 at 2045-03-30 12:58 UTC Top-down view of the ecliptic, Earth at the centre, for the 2045-03-30 12:58 UTC close approach of 516435. Catalogue miss distance 68.0 LD · 2.61 × 10⁷ km. The curve is the geocentric path from 2045-03-27 to 2045-04-02, with a mark at UTC midnights and an arrow for the direction of motion. The circle is the Moon’s mean orbit; the Moon is plotted at closest approach. A ray shows the Sun’s direction. The labelled distance is the full separation. The drawn radius is the part that lies in the ecliptic plane. At closest approach the object is south of the ecliptic. The path is a geocentric ecliptic ephemeris from JPL Horizons. The inset is a heliocentric view and is approximate. Sun 68.0 LD · 2.61 × 10⁷ km 2045-03-30 12:58 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2045-03-30 12:58 UTC close approach of 516435. Catalogue miss distance 68.0 LD · 2.61 × 10⁷ km. The curve is the geocentric path from 2045-03-27 to 2045-04-02, with a mark at UTC midnights and an arrow for the direction of motion. The circle is the Moon’s mean orbit; the Moon is plotted at closest approach. A ray shows the Sun’s direction. The labelled distance is the full separation. The drawn radius is the part that lies in the ecliptic plane. At closest approach the object is south of the ecliptic. The path is a geocentric ecliptic ephemeris from JPL Horizons. The inset is a heliocentric view and is approximate.

JPL Horizons

When (UTC) Body Distance Lunar distances Relative speed
2029-04-02 08:08:00 Venus 0.1145 AU 44.5 LD 25.5 km/s
2045-03-30 12:58:00 Earth 0.1748 AU 68.0 LD 19.2 km/s
2052-03-30 15:39:00 Earth 0.135 AU 52.6 LD 17.9 km/s
2056-04-22 03:54:00 Venus 0.1291 AU 50.2 LD 26.2 km/s
2059-04-01 18:48:00 Earth 0.1418 AU 55.2 LD 17.1 km/s
2066-04-03 21:35:00 Earth 0.1858 AU 72.3 LD 16.7 km/s
2066-10-14 11:52:00 Venus 0.1219 AU 47.4 LD 25.3 km/s
2093-03-30 19:42:00 Earth 0.1923 AU 74.8 LD 19.6 km/s
2093-11-02 17:58:00 Venus 0.1189 AU 46.3 LD 25.9 km/s
2100-03-31 15:36:00 Earth 0.1416 AU 55.1 LD 18.2 km/s

Next ten from today. 1 lunar distance = 384,400 km. Source: JPL close-approach data.

Sources